One more “Move Power” device was disassembled for spare parts (solar panel, diode, batteries and charging circuit). While specifying that it provides 30000 mAh, when taken apart, actually contains four 1800 mAh batteries. In previous case of disassembling of such a device these were three batteries of unknown capacity. In addition, some batteries were detached from what should have been the battery array (batteries soldered in parallel to each other). As a result, I had to recreate the battery arrays.

I have attached all battery arrays in parallel, creating one bigger battery array.

All this was connected to the solar array

To allow battery voltage reporting, an A2D converter was added after soldering on appropriate pins. Also additional wires were added from the battery to the ADC Channel1 for voltage sensing.

I have tried to keep everything detachable for better maintainability

Finally we have standalone box (larger than before) that should:

– recharge itself if there is no direct sunlight shining on and its solar panels